version of program from git tags auto.

Makefile

@@ -12,7 +12,7 @@ MKDIR	= mkdir
 INSTALL	= install
 BIN		= $(BUILD_ROOT)
 MAN		= $(BIN)
-VERSION	= $(shell cat VERSION)
+VERSION	= $(shell git describe --tags)
 RELEASE	= 0
 RPMSOURCEDIR	= $(shell rpm --eval '%_sourcedir')
 RPMSPECDIR	= $(shell rpm --eval '%_specdir')
@@ -26,7 +26,7 @@ RPMBUILD = $(shell				\
 ## Make bin for lvs-metrics.
 bin: ${CURDIR_LINK}
 	#./control build
-	go build -i -ldflags "-X g.Commit=${COMMIT}" -o lvs-metrics .
+	go build -i -ldflags "-X github.com/mesos-utility/lvs-metrics/g.Version=${VERSION}" -o lvs-metrics .
 
 ## Get godep and restore dep.
 godep:

g/g.go

@@ -4,10 +4,9 @@ import (
 	"runtime"
 )
 
-const (
-	VERSION = "0.2.0"
-	Commit  = ""
-)
+// version will be populated by the Makefile, read from
+// VERSION file of the source code.
+var Version = ""
 
 func init() {
 	runtime.GOMAXPROCS(runtime.NumCPU())

g/util.go

@@ -53,7 +53,7 @@ func CalculateMetricRatio(metrics ...string) string {
 // display version info.
 func HandleVersion(displayVersion bool) {
 	if displayVersion {
-		fmt.Println(VERSION)
+		fmt.Println(Version)
 		os.Exit(0)
 	}
 }

http/common.go

@@ -14,7 +14,7 @@ func configCommonRoutes() {
 	})
 
 	http.HandleFunc("/version", func(w http.ResponseWriter, r *http.Request) {
-		w.Write([]byte(fmt.Sprintf("%s\n", g.VERSION)))
+		w.Write([]byte(fmt.Sprintf("%s\n", g.Version)))
 	})
 
 	http.HandleFunc("/workdir", func(w http.ResponseWriter, r *http.Request) {